Homemade Laundry Soap: Is it worth it?

I have taken the recipe for homemade laundry soap from the Duggars, that use it for their huge amounts of laundry with a family of 20 people.

This is from their web site:
Powdered Laundry Detergent - Top load machine

1 Bar Fels-Naptha Soap Bar
1 Cup Arm & Hammer Super Washing Soda
½ Cup Borax

-Grate soap or break into pieces and process in a food processor until powdered. Mix all ingredients. For light load, use 1 Tablespoon. For heavy or heavily soiled load, use 2 Tablespoons. Yields: 3 Cups detergent. (Approx. 40 loads)

It was a long math process, but I figured the cost of everything from Amazon, and it looks like the real cost is a little higher, but for the sake of this argument we will use their information that says its about $2 to make a batch that does 40 loads. Making it .05 cents a load. I did not include tax.

I buy your basic all natural arm and hammer powdered detergent at Walmart for around $6, we will say $6.50 with tax. I only buy it with a coupon, making it $5.50. If you use one Tablespoon per load, which is more than enough for very clean clothes we have found, one box lasts about 200 loads. This makes the cost .0275 cents a load, half the cost.

It is still all natural, doesn’t require the work of making it, works just as well.

Not worth my time or effort for homemade!!!